the Pykrete Dome - worlds biggest icedome - a movie by Bart van Overbeeke - Structural Ice

That's a big igloo.

Check out the ice/wood pulp structure up there. There aren't many details in the video ('fiber-reinforced ice', sure but which fiber?) , but there are more over on the accompanying website.

And the construction video (below) look like a load of fun.

ICE SWORD! (Made With Pykrete)

That's a heck of a sword there,

And it's way stronger than it would have been if it were made of just ice.

See, ice is strong in compression but weak in tension. Paper - toilet paper, for example - is the opposite: weak in compression but strong in tension.

Combine them together, and you get a whole that is far greater than the sum of its parts. See, that's a composite for you.